package com.sky.service.impl;

import com.sky.context.BaseContext;
import com.sky.dto.ShoppingCartDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.ShoppingCart;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.mapper.ShoppingCartMapper;
import com.sky.service.ShoppingCartService;
import lombok.extern.java.Log;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class ShoppingCartServiceImpl implements ShoppingCartService {

    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;
    public void addShoppingCart(ShoppingCartDTO shoppingCartDTO) {

        //判断是否存在添加的商品
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        //如果存在则数量更新
        if(shoppingCartList != null && shoppingCartList.size() > 0) {
            ShoppingCart cart = shoppingCartList.get(0);
            cart.setNumber(cart.getNumber() + 1);

            shoppingCartMapper.updateNumberById(cart);
        }else{
            //判断加入的是菜品还是套餐
            Long dishId = shoppingCartDTO.getDishId();
            if(dishId != null) {
                //本次添加的是菜品
                Dish dish = dishMapper.getById(dishId);
                shoppingCart.setName(dish.getName());
                shoppingCart.setImage(dish.getImage());
                shoppingCart.setAmount(dish.getPrice());
            }else {
                //本次添加的是套餐
                Long setmealId = shoppingCart.getSetmealId();
                Setmeal setmeal = setmealMapper.getById(setmealId);
                shoppingCart.setName(setmeal.getName());
                shoppingCart.setImage(setmeal.getImage());
                shoppingCart.setAmount(setmeal.getPrice());
            }
            shoppingCart.setNumber(1);
            shoppingCart.setCreateTime(LocalDateTime.now());

            //添加到数据库中
            shoppingCartMapper.insert(shoppingCart);
        }

    }

    public List<ShoppingCart> showShoppingCart() {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();
        //构建对象
        ShoppingCart shoppingCart = ShoppingCart.builder()
                .userId(userId).build();

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);
        return list;
    }


    public void deleteByUserId() {
        //获取当前用户id
        Long userId = BaseContext.getCurrentId();

        shoppingCartMapper.deleteByUserId(userId);
    }


    public void subShoppingCart(ShoppingCartDTO shoppingCartDTO) {
        ShoppingCart shoppingCart = new ShoppingCart();
        BeanUtils.copyProperties(shoppingCartDTO,shoppingCart);
        Long userId = BaseContext.getCurrentId();
        shoppingCart.setUserId(userId);

        List<ShoppingCart> list = shoppingCartMapper.list(shoppingCart);

        ShoppingCart shoppingCart1 = list.get(0);

        //获取当前商品数量
        Integer number = shoppingCart1.getNumber();
        //如果当前商品数量为1则删除该商品
        if (number == 1) {
            Long id = shoppingCart1.getId();
            shoppingCartMapper.deleteById(id);
        }else {
            shoppingCart1.setNumber(number - 1);
            shoppingCartMapper.updateNumberById(shoppingCart1);
        }
    }
}
